sequenceDiagram
    participant AppA as 应用A
    participant BusA as 本地Bus
    participant Transport as 传输层
    participant BusB as 本地Bus
    participant AppB as 应用B
    
    AppA->>BusA: 发送命令/事件/数据
    BusA->>Transport: 封装为Envelope
    Transport->>BusB: 跨进程/网络传输
    BusB->>AppB: 解封装并分发
    
    AppB->>BusB: 响应数据
    BusB->>Transport: 返回响应
    Transport->>BusA: 传输响应
    BusA->>AppA: 传递响应